Find First and Last Day Of Each Month

The first day of each month is always 1. However if you interested to find the First and Last Date of each month using a Sql Query, here it is:

-- Return First and Last Date of a Month
DECLARE @Month smallint
SET @Month = 1

SELECT DAY(DATEADD(Month, DATEDIFF(Month, -1, getdate()) - 2, -1) + 1) as FirstDayofMonth,
DAY(DATEADD(Month, DATEDIFF(Month,0,getdate())+@Month, -1)) as LastDayOfMonth

If you wish to find out the Lastday of the previous month, just set @Month to 0.